I would say that when I was teaching, that there were only 2 students who I found to be "stuck" at beginner level. But I attribute that more to my failing to figure out a way to either figure out their sticking point, or being able to fix the problem. Everyone can learn, and it's not hard to learn the basics. After that, it's about feeling the music and connecting with your partner! Lindy scenes are generally very progressive. Girls dance with girls; guys dance with guys. No one really gives a crap whether you're gay or straight as long as you don't turn them down for a dance!